EP0681536B1 - Airbag und verfahren zu seiner herstellung - Google Patents

Airbag und verfahren zu seiner herstellung Download PDF

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Publication number
EP0681536B1
EP0681536B1 EP94905715A EP94905715A EP0681536B1 EP 0681536 B1 EP0681536 B1 EP 0681536B1 EP 94905715 A EP94905715 A EP 94905715A EP 94905715 A EP94905715 A EP 94905715A EP 0681536 B1 EP0681536 B1 EP 0681536B1
Authority
EP
European Patent Office
Prior art keywords
edges
cutting
sections
air bag
folding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94905715A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0681536A1 (de
Inventor
Johann Berger
Artur Foehl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19934302904 external-priority patent/DE4302904A1/de
Priority claimed from DE19934343738 external-priority patent/DE4343738A1/de
Application filed by Individual filed Critical Individual
Publication of EP0681536A1 publication Critical patent/EP0681536A1/de
Application granted granted Critical
Publication of EP0681536B1 publication Critical patent/EP0681536B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H5/00—Seaming textile materials

Definitions

  • the invention relates to an airbag of different shapes, which is produced in that a piece of material, "blank”, is cut out of a web of textile material or plastic film, and that its edges are then joined together.
  • "Connect” is primarily to be understood as a sewing process, provided it is a textile material. With plastic film and also with textile material, bonding and welding processes can also be used for joining. The description of the figures speaks largely of textile material and sewing processes, but the invention is not intended to be restricted to this.
  • airbags of greater depth should be able to be produced, in particular cubic or pear-shaped airbags, such as are required above all for the passenger side.
  • Such airbags are known to be produced by sewing together a front and a rear fabric section with an all-round jacket part. From DE, A, 24 39 222 (balloon factory), Figures 4 and 5 there, it is also known to use a relatively large, all-round cutout to produce an approximately pear-shaped airbag, which has individual outwardly projecting prongs that are sewn together. If you want to avoid the accumulation of seams or adhesions at the point where the prongs meet, the tips of the prongs must be cut out in an arc and then connected to both sides with a circular cover sheet. In this case, three pieces of fabric are required to manufacture the airbag.
  • the aim of the present invention is to create an airbag which can have any desired shape, especially a great depth, and which requires as few connections, in particular sewing operations, to be produced.
  • the stated object can be achieved in two variants according to claims 1 or 2.
  • adjacent folding edges form acute angles with one another.
  • the sections can be folded so that a type of screen structure is formed, the outer edges of which enable easy connection, in particular sewing.
  • an airbag of considerable size results.
  • the shape of the airbag can be varied greatly by selecting sections of different shapes and sizes. While the blank is preferably in one piece, it could also be made from e.g. B. sew two sections together, which can be useful especially in very complicated shapes.
  • the blank can essentially have the shape of a square or a rectangle, wherein the side edges of the square or rectangle can be drawn in to form a cavity of greater depth.
  • the invention further relates to a method of manufacturing an airbag having more than two of the above-mentioned sections.
  • the blank is folded into a structure in the manner of a closed umbrella (parasol, umbrella), which is referred to here as "umbrella structure".
  • the bars of the screen correspond to the inner folding edges
  • the outer folding edges correspond to the outer edges of the fabric parts of the screen which protrude outwards between two bars.
  • For sewing two sections are placed flat on both sides of an outer folding edge. The free edges of these two sections, which correspond to the fabric edge of the screen, are then sewn together in one plane, in each case for the two sections adjacent to an outer folding edge, then the two sections which are adjacent to another outer folding edge, etc.
  • Four sections can also be placed in one plane at the same time, namely the sections which belong to two adjacent outer folding edges. You can then sew four sections together on one level. If a robotic device is used for sewing, all sections can be sewn together at the same time.
  • the web from which the blanks for the airbags are to be cut out can have holes for gas outlet in a known manner, but preferably gas-permeable zones, namely zones which consist of a more gas-permeable material than the rest of the web.
  • gas-permeable zones namely zones which consist of a more gas-permeable material than the rest of the web.
  • This principle is known from DE, A, 41 26 709 (Akzo).
  • the zones in the web can be arranged so that in the finished airbag they are located outside of the area to be facing the occupant (the "impact surface").
  • the gas outlet then does not bother the occupant.
  • the gas-permeable zones can be strips running in the longitudinal or transverse direction of the web.
  • FIG. 1 shows a pear-shaped airbag 40 with its impact surface 18 to be turned towards the passenger and its connection opening 20 for a gas generator at the rear on the right.
  • the airbag has an asymmetrical shape. Unsymmetrical airbags can be better adapted to the interior structure of a vehicle, i.e. the passenger side, the space between the occupant, dashboard, windshield and the A-pillar (the A-pillar is the front right of the windshield).
  • a blank 41 which is shown in perspective in FIG. 2, is used to produce this airbag.
  • the blank has folded edges 42il, 42al, 42i ', 42a2 and 42i2, which run at acute angles to each other. Sewing edges 44 on both sides of the folded edge 42al have mutually mirror-image shapes. Likewise, the sewing edges 46 on both sides of the folded edge 42a2 have mirror images of one another, but which differ from those of the sewing edges 44.
  • sections 47 are placed on mirror-image sections 47, that is to say sections of the same size and mirror-image shape, while mirror-image sections 49 protrude toward one another. Seams 45 are now produced along sewing edges 44 and 46, whereby the two sections 47 are connected to one another and the two sections 48 are connected to one another.
  • other joining operations can be used instead of sewing operations, e.g. B. welding or gluing, which is also applicable to textile material, but is particularly important in the event that plastic films are used instead of textile material.
  • the structure thus far is then folded according to FIG. 11, an inner folded edge 42i2 being formed between sections 48 and 49.
  • the two sections 49 are placed one on top of the other, and their sewing edges 44 'are then sewn together (seams 53), but in such a way that the connection opening 20 remains free.
  • the procedure can also be reversed, namely first folding according to FIG. 4, producing the seams 53 and only then folding according to FIGS. 3 and 3a and producing the seams 45.
  • blanks 50 in the form of squares with cut corners can be produced from a web, in particular fabric web 2.
  • These blanks are given inner fold edges 52i along their diagonals and outer fold edges 52a parallel to the square edges. All folded edges cross the cut surface completely, i.e. over their entire length, height or diagonal.
  • Sections 54 are formed by the folded edges, which are mirror images of one another both with regard to the folded edges 52i and with respect to the folded edges 52a.
  • the sections e.g. B. both sides of an outer folded edge are mirror images of each other, while they have different shapes on both sides of an inner folded edge. This results e.g. B. if you use a rectangle as the basic shape instead of a square.
  • FIG. 6 is shown here in perspective in a symmetrical arrangement. Here one can see all the outer folded edges 52a and one of the four inner folded edges 52i. There are four sewing edges 56 on which the four seams 58 are produced one after the other.
  • the cross-like structure at the front left serves to form the connection opening 60. No sewing is carried out here, and when the structure is expanded, the connection opening for the gas generator results here.
  • the structure according to FIG. 6 is similar to a closed screen, the tip of which is on the right (rear) and is therefore referred to as a "screen structure".
  • the inner folded edges 52i correspond to the bars of the closed screen, while the outer folded edges 52a in the case of the screen are formed by the outward-lying fabric parts.
  • the sewing edges 56 are formed on the screen by the free fabric edges.
  • FIG. 9 shows that two of the wings 62 are brought into a common plane for sewing , while the other two wings protrude with sections 54 'upwards.
  • Figure 8 shows that one can also proceed differently.
  • Figures 10 and 11 show the finished airbag in side view or in perspective.
  • FIG. 6 shows an umbrella structure with four wings 62, the sewing edges 56 of which are straight
  • umbrella structures of a different type can also be produced, e.g. B. those with only three wings or five or more wings.
  • the sewing edges 56 do not need to be a straight line either, but can e.g. B. be curved outwards, resulting in a larger cavity.
  • FIGS. 7 to 11 Here are the side edges of the squares. Obtuse-angled triangle pieces were cut away. The result is an airbag according to FIGS. 10 and 11 of smaller volume but greater depth than an airbag which is produced from a blank according to FIG. 5.
  • FIGS. 12 to 18 show fabric webs 2 with cut surfaces, all of which correspond to the cut 41 from FIG. 2. Only in FIG. 12 are the inner and outer folded edges 42il, 42a1, 42i ', 42a2, 42i2 drawn into one of the cut surfaces.
  • Gas-permeable zones are provided in all fabric webs, which are represented here in places by wide hatching, while the other components of the cut surfaces consist of a dense fabric, which is shown here in places by narrow cross-hatching.
  • the dense fabric can be woven in plain weave, the gas-permeable zones in a twill weave.
  • the cut surfaces 90, 91, 92 are arranged in two parallel rows within the web 2, and are nested against one another, so that as little waste as possible arises when cutting out.
  • gas-permeable strips 90 are provided which run over the entire width of the web.
  • a dense fabric e.g. B. is made in plain weave
  • a more permeable fabric for. B. is made in a twill weave.
  • the gas-permeable zones in FIG. 12 coincide with one another for the cutting surfaces arranged offset with respect to one another, that is to say they run from top to bottom in FIG. 12, that is to say unchanged over the web width.
  • a disadvantage of this arrangement is that it is sometimes necessary to sew in less firm tissue.
  • This disadvantage is remedied according to FIG. 13 in that the gas-permeable zones 91 are arranged there within the cut surface 80 in such a way that they do not reach the edges thereof. So you then have a solid fabric of sufficient width for sewing.
  • the gas-permeable zones have the shape of rectangles, which can be produced with a shaft weaving machine. It is essential that, according to FIGS. 12, 13 and 14, the same distances a within the blank are the distance between two gas-permeable Determine zones. The edges of the gas-permeable zones also have distances a from one cut to the other, as can be seen below in FIGS. 12 to 14. This leads to a simplified control of the dobby loom.
  • FIG. 14 shows an arrangement similar to FIG. 13, but in which the gas-permeable zones 92 are better adapted to the shape of the cut surface. This allows you to largely use the space available.
  • the gas-permeable zone 92 can be with the help of a dobby loom, for. B. in twill weave.
  • Figures 15 to 18 show another arrangement.
  • the cut surfaces 83 to 86 are arranged one behind the other in the longitudinal direction of the web, and as space-saving as possible. 15, like in FIG. 14, are largely adapted to the shape of the cut surface and can be produced with a shaft weaving machine.
  • FIG. 16 shows cut surfaces 84 in which the shapes of the gas-permeable zones 94 are largely better adapted.
  • a jacquard device is required for weaving.
  • the advantage here is that the shape of the gas-permeable zones can be ideally adapted to the shape of the cut, but the disadvantage must be accepted that a jacquard device must be used, which is more expensive than a dobby.
  • the weaving process takes longer than with a dobby. One must therefore consider whether a zone shape according to FIG. 15 is ultimately cheaper.
  • FIG. 17 shows, within a fabric web 2, successive cut surfaces 85 with gas-permeable zones 95 and 95a, in each case several such gas-permeable zones 95 in the longitudinal direction of the web within a blank. If a fabric defect occurs in an arrangement according to FIG. 15, part of the fabric web must remain unused, namely as much in the longitudinal direction of the web as one of the cut surfaces occupies. In the case of an arrangement according to FIGS. 12 to 14, in this case a part of the fabric web which remains at least half the longitudinal direction of one of the blanks must remain unused. According to Figure 17, only such a small part of the fabric web needs to remain unused as the shift by z. B. corresponds to a distance between two gas-permeable zones.
  • the gas-permeable zones 95 can be produced with a shaft weaving machine, the gas-permeable zones 96 with a jacquard device.
  • Airbags can also be made from plastic film instead of textile fabrics. This is particularly important in the case that newer gas generators emit low temperature gases so that there is no risk of the plastic film melting. Plastic films must also be equipped with gas-permeable zones. These zones are created by punching out or burning holes.
  • the blanks from plastic foils are preferably glued or welded together.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Air Bags (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)
EP94905715A 1993-02-02 1994-01-27 Airbag und verfahren zu seiner herstellung Expired - Lifetime EP0681536B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4302904 1993-02-02
DE19934302904 DE4302904A1 (de) 1993-02-02 1993-02-02 Verfahren und Vorrichtung zur Herstellung eines textilen Hohlkörpers
DE4343738 1993-12-21
DE19934343738 DE4343738A1 (de) 1993-12-21 1993-12-21 Airbag und Verfahren zu seiner Herstellung
PCT/EP1994/000222 WO1994018033A1 (de) 1993-02-02 1994-01-27 Airbag und verfahren zu seiner herstellung

Publications (2)

Publication Number Publication Date
EP0681536A1 EP0681536A1 (de) 1995-11-15
EP0681536B1 true EP0681536B1 (de) 1997-06-11

Family

ID=25922725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94905715A Expired - Lifetime EP0681536B1 (de) 1993-02-02 1994-01-27 Airbag und verfahren zu seiner herstellung

Country Status (19)

Country Link
US (1) US5671935A (zh)
EP (1) EP0681536B1 (zh)
JP (1) JPH08506296A (zh)
KR (1) KR960700162A (zh)
CN (1) CN1117282A (zh)
AT (1) ATE154303T1 (zh)
AU (1) AU678810B2 (zh)
BR (1) BR9405878A (zh)
CA (1) CA2155027A1 (zh)
CZ (1) CZ196895A3 (zh)
DE (1) DE59403116D1 (zh)
ES (1) ES2104345T3 (zh)
FI (1) FI952276A (zh)
HU (1) HU217863B (zh)
NO (1) NO953027L (zh)
NZ (1) NZ261116A (zh)
PL (1) PL172953B1 (zh)
SK (1) SK96595A3 (zh)
WO (1) WO1994018033A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005005246A1 (de) * 2005-02-04 2006-08-10 Trw Automotive Gmbh Gassackzuschnitt und Verfahren zur Herstellung eines Gassacks

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005986A1 (de) * 1994-08-25 1996-02-29 Johann Berger Verfahren zur herstellung eines airbag-hohlkörpers
DE4443949C1 (de) * 1994-12-09 1996-02-08 Johann Berger Verfahren zur Herstellung eines Airbag-Hohlkörpers
US5520414A (en) * 1994-11-23 1996-05-28 Milliken Research Corporation Inflatable restraint cushion
US5697640A (en) * 1996-02-16 1997-12-16 Trw Vehicle Safety Systems Inc. Pleated air bag
US5823567A (en) * 1996-07-03 1998-10-20 Precision Fabrics Group, Inc. Folded inflatable protective device and method for making same
DE19633387A1 (de) * 1996-08-19 1998-02-26 Takata Europ Gmbh Verfahren und Vorrichtung zum Unterbringen eines Luftsackes einer Airbagvorrichtung in einem Behälter und Airbagvorrichtung mit einem zu einem Paket gefalteten Luftsack
CN1044884C (zh) * 1997-08-05 1999-09-01 中国纺织大学 非涂层全成形型安全气囊织物的加工方法
US6180204B1 (en) * 1997-08-12 2001-01-30 Milliken & Company One piece air bag
DE19811200C2 (de) * 1998-03-09 2002-03-14 Takata Petri Ag Einteiliger Gassack für ein Airbagmodul
US6666477B1 (en) * 1999-08-25 2003-12-23 Milliken & Company Inflatable restraint system and method
US6632753B1 (en) 2000-04-26 2003-10-14 Safety Components Fabric Technologies, Inc. Motor vehicle air bag and fabric for use in same
US7871480B1 (en) 2001-11-21 2011-01-18 Toney Wayne H Apparatus and method for making motor vehicle air bags, and air bags made by same
JP4145128B2 (ja) * 2002-02-08 2008-09-03 ダイハツ工業株式会社 エアバッグ
GB2386586B (en) * 2002-03-19 2005-06-08 Autoliv Dev Improvements in or relating to an air-bag
US7063029B1 (en) * 2002-11-26 2006-06-20 Hot Off The Press Promotions, Inc. Umbrella, umbrella cover, and method of making
US7581504B1 (en) 2005-06-17 2009-09-01 Brandbrella, Llc Printed umbrella, umbrella cover, and method of making
DE102005030873A1 (de) * 2005-07-01 2007-01-04 Trw Automotive Gmbh Gassack
US20070284864A1 (en) * 2006-06-08 2007-12-13 Trw Vehicle Safety Systems Inc. Inflatable vehicle occupant protection device construction
US7883112B2 (en) * 2008-05-27 2011-02-08 Autoliv Asp, Inc. Textile gas guide for inflatable curtain
JP2010052562A (ja) * 2008-08-28 2010-03-11 Takata Corp エアバッグ及びエアバッグ装置
JP5093374B2 (ja) * 2011-03-10 2012-12-12 東洋紡株式会社 エアバッグ
DE102014221161A1 (de) 2014-10-17 2016-04-21 Johnson Controls Gmbh Verfahren zur Herstellung eines Sitzbezuges und Sitzbezug
DE102015111873B4 (de) * 2015-07-22 2017-02-09 Autoliv Development Ab Gassack mit Anbringung für einen Gasgenerator
CN105525630A (zh) * 2015-12-09 2016-04-27 深圳市胜义环保有限公司 一种大曲率边坡hdpe膜的裁接方法
US10829082B2 (en) * 2018-01-31 2020-11-10 Nissan North America, Inc. Airbag device
CN112298090B (zh) * 2019-07-15 2022-05-27 广州汽车集团股份有限公司 一种侧气帘气袋总成及侧气帘气袋裁片版

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005005246A1 (de) * 2005-02-04 2006-08-10 Trw Automotive Gmbh Gassackzuschnitt und Verfahren zur Herstellung eines Gassacks

Also Published As

Publication number Publication date
NO953027D0 (no) 1995-08-01
US5671935A (en) 1997-09-30
BR9405878A (pt) 1995-12-12
DE59403116D1 (de) 1997-07-17
NZ261116A (en) 1996-09-25
SK96595A3 (en) 1996-08-07
HU217863B (hu) 2000-04-28
PL310088A1 (en) 1995-11-27
CN1117282A (zh) 1996-02-21
FI952276A0 (fi) 1995-05-10
AU5971694A (en) 1994-08-29
ES2104345T3 (es) 1997-10-01
HU9502273D0 (en) 1995-09-28
PL172953B1 (pl) 1997-12-31
JPH08506296A (ja) 1996-07-09
NO953027L (no) 1995-08-01
WO1994018033A1 (de) 1994-08-18
CZ196895A3 (en) 1996-02-14
KR960700162A (ko) 1996-01-19
AU678810B2 (en) 1997-06-12
CA2155027A1 (en) 1994-08-18
FI952276A (fi) 1995-05-10
ATE154303T1 (de) 1997-06-15
HUT72155A (en) 1996-03-28
EP0681536A1 (de) 1995-11-15

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